Note 11 - Stock-based Compensation Plan - Unvested Stock Activity (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2023 $ / shares shares
Unvested shares outstanding (in shares) | shares	288,450
Unvested shares outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 7.8
Granted, number of shares (in shares) | shares	97,461
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 16.43
Vested, number of shares (in shares) | shares	(169,636)
Vested, weighted average exercise price (in dollars per share) | $ / shares	$ 7.79
Forfeited, number of shares (in shares) | shares	(17,491)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares	$ 10.08
Unvested shares outstanding (in shares) | shares	198,784
Unvested shares outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 11.72